linux/drivers/scsi/libfc/fc_npiv.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright(c) 2009 Intel Corporation. All rights reserved.
 *
 * Maintained at www.Open-FCoE.org
 */

/*
 * NPIV VN_Port helper functions for libfc
 */

#include <scsi/libfc.h>
#include <linux/export.h>

/**
 * libfc_vport_create() - Create a new NPIV vport instance
 * @vport: fc_vport structure from scsi_transport_fc
 * @privsize: driver private data size to allocate along with the Scsi_Host
 */

struct fc_lport *libfc_vport_create(struct fc_vport *vport, int privsize)
{ … }
EXPORT_SYMBOL(…);

/**
 * fc_vport_id_lookup() - find NPIV lport that matches a given fabric ID
 * @n_port: Top level N_Port which may have multiple NPIV VN_Ports
 * @port_id: Fabric ID to find a match for
 *
 * Returns: matching lport pointer or NULL if there is no match
 */
struct fc_lport *fc_vport_id_lookup(struct fc_lport *n_port, u32 port_id)
{ … }
EXPORT_SYMBOL(…);

/*
 * When setting the link state of vports during an lport state change, it's
 * necessary to hold the lp_mutex of both the N_Port and the VN_Port.
 * This tells the lockdep engine to treat the nested locking of the VN_Port
 * as a different lock class.
 */
enum libfc_lport_mutex_class { … };

/**
 * __fc_vport_setlink() - update link and status on a VN_Port
 * @n_port: parent N_Port
 * @vn_port: VN_Port to update
 *
 * Locking: must be called with both the N_Port and VN_Port lp_mutex held
 */
static void __fc_vport_setlink(struct fc_lport *n_port,
			       struct fc_lport *vn_port)
{ … }

/**
 * fc_vport_setlink() - update link and status on a VN_Port
 * @vn_port: virtual port to update
 */
void fc_vport_setlink(struct fc_lport *vn_port)
{ … }
EXPORT_SYMBOL(…);

/**
 * fc_vports_linkchange() - change the link state of all vports
 * @n_port: Parent N_Port that has changed state
 *
 * Locking: called with the n_port lp_mutex held
 */
void fc_vports_linkchange(struct fc_lport *n_port)
{ … }